I always believe in Juan Martin del Potro's consistency even though Marin Cilic took the first set in their quarterfinal match last night.
By the time del Potro levelled at 3-3 in the second set, I went to bed because I'm pretty confident about his chance to the semifinal.
As expected, Del Potro sealed it with a 4-6, 6-3, 6-2, 6-1 victory.
The second quarterfinal match between Rafael Nadal and Fernando Gonzalez was suspended due to rain.
Here's Friday's order of play on day 12 at the U.S. Open (prefix denotes seeding):
(Starts at 12:30 PM)
Kim Clijsters (Belgium) v 2-Serena Williams (USA)
(Not before 2:00 PM; match may be moved to Armstrong)
11-Fernando Gonzalez (Chile) v 3-Rafael Nadal (Spain)
(Match may be moved to Armstrong)
Yanina Wickmayer (Belgium) v 9-Caroline Wozniacki (Denmark)
(Images via Yahoo! Sports)